Chisham, G. 
ORCID: https://orcid.org/0000-0003-1151-5934; Freeman, M.P. ORCID: https://orcid.org/0000-0002-8653-8279.
2010
On the non-Gaussian nature of ionospheric vorticity.
Geophysical Research Letters, 37 (12), L12103.
5, pp.
10.1029/2010GL043714
We present, for the first time, the probability density function (PDF) of ionospheric vorticity measurements made by the SuperDARN HF radars. We show that the PDF is typically heavy-tailed and best modelled by the q-exponential distribution across most of the ionosphere, except in the dayside region 1 current region where the Weibull distribution provides the best model. We identify these distributions as stationary solutions of a Fokker-Planck equation whose corresponding Langevin equation can be derived from the classic baroclinic and barotropic vorticity equations, respectively.
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